Javascript jQuery分页插件-Can';t单击";“下一步”;在第一页

Javascript jQuery分页插件-Can';t单击";“下一步”;在第一页,javascript,jquery,pagination,Javascript,Jquery,Pagination,这与以下jQuery分页代码有关: 已经对原始代码进行了一些定制,包括所做的更改 以下是现在更新的代码: /** *这个jQuery插件在所选元素中显示分页链接。 * *此插件至少需要jQuery 1.4.2 * *@作者加布里埃尔·伯克(伯克*at*d-scribe*dot*de) *@version 2.2 *@param{int}maxentries要分页的条目数 *@param{Object}选择几个选项(有关文档,请参阅自述) *@return{Object}jQuery对象 */

这与以下jQuery分页代码有关:

已经对原始代码进行了一些定制,包括所做的更改

以下是现在更新的代码:

/**
*这个jQuery插件在所选元素中显示分页链接。
* 
*此插件至少需要jQuery 1.4.2
*
*@作者加布里埃尔·伯克(伯克*at*d-scribe*dot*de)
*@version 2.2
*@param{int}maxentries要分页的条目数
*@param{Object}选择几个选项(有关文档,请参阅自述)
*@return{Object}jQuery对象
*/
(函数($){
/**
*@class用于计算分页值
*/
$.PaginationCalculator=函数(maxentries,opts){
this.maxentries=maxentries;
this.opts=opts;
};
$.extend($.PaginationCalculator.prototype{
/**
*计算最大页数
*@方法
*@返回{Number}
*/
numPages:function(){
返回Math.ceil(每页this.maxentries/this.opts.items);
},
/**
*计算分页链接的起点和终点,具体取决于
*当前页面和数值显示项。
*@returns{Array}
*/
getInterval:函数(当前页面){
var ne_half=Math.floor(this.opts.num_display_entries/2);
var np=this.numPages();
var upper\u limit=np-this.opts.num\u display\u条目;
var start=current_page>ne_half?Math.max(Math.min(current_page-ne_half,上限),0:0;
var end=current_page>ne_half?Math.min(当前_page+ne_half+(this.opts.num_display_entries%2),np):Math.min(this.opts.num_display_entries,np);
返回{start:start,end:end};
}
});
//初始化分页呈现器的jQuery对象容器
$.PaginationRenders={};
/**
*@class用于呈现分页链接的默认呈现器
*/
$.PaginationRenders.defaultRenderer=函数(maxentries,opts){
this.maxentries=maxentries;
this.opts=opts;
this.pc=new$.PaginationCalculator(maxentries,opts);
};
$.extend($.PaginationRenders.defaultRenderer.prototype{
/**
*用于生成单个链接的帮助函数(如果是当前页面,则为span标记)
*@param{Number}page_id新项目的页面id
*@param{Number}当前页面
*@param{Object}appends为新项选择选项:文本和类
*@returns{jQuery}包含链接的jQuery对象
*/
createLink:函数(页面id、当前页面、附录选项){
var lnk,np=this.pc.numPages();
page\u id=page\u id 0&&this.opts.num\u edge\u entries>0)
{
end=Math.min(this.opts.num\u edge\u条目,interval.start);
appendRange(片段,当前_页,0,end,{classes:'sp'});
if(this.opts.num\u edge\u entries0)
{
if(np-this.opts.num\u edge\u entries>interval.end&&this.opts.eliple\u text)
{
$(“”+this.opts.ellipse_text+“”)appendTo(fragment);
}
begin=Math.max(np-this.opts.num\u edge\u条目,interval.end);
appendRange(片段,当前_页,begin,np,{classes:'ep'});
}
//生成“下一步”-链接
currentNextPage=Math.ceil(当前页面/7)*7;
append(this.createLink(currentNextPage,current_page,{text:this.opts.next_text,class:“next”,rel:“next”}));
$('a',片段)。单击(eventHandler);
返回片段;
}
});
//扩展jQuery
$.fn.pagination=函数(maxentries,opts){
opts=$.extend({
每页项目:7,
显示条目数:35,
当前页面:1,
数值\u边\u项:0,
链接到:“#”,
上一个文本:“”,
椭圆_文本:“…”,
上一个节目总是:真的,
下一个节目总是:真的,
渲染器:“defaultRenderer”,
如果显示单个页面,则显示:true,
加载第一页:真,
回调:函数(){return false;}
},选择|{});
var containers=这个,
渲染器、链接、当前页面;
/**
*这是分页链接的事件处理函数。
*@param{int}page_id新页码
*/
函数分页ClickHandler(evt){
var链接,
新建当前页面=$(evt.target).data('page\u id'),
continuePropagation=选择页面(新建页面和当前页面);
如果(!继续复制){
evt.stopPropagation();
}
返回继续复制;
}
/**
*这是用于内部事件处理程序的实用程序函数。
*它在分页容器对象上设置新的当前页面,
*为分页链接和调用生成新的HTMl片段
*回调函数。
*/
功能选择页面(新建当前页面){
//更新所有容器的链接显示
容器数据(“当前页面”,新的当前页面);
links=renderer.getLinks(新建当前页面,分页ClickHandler);
容器。空();
链接。附加到(容器);
//调用回调并传播事件,如果
/**
 * This jQuery plugin displays pagination links inside the selected elements.
 * 
 * This plugin needs at least jQuery 1.4.2
 *
 * @author Gabriel Birke (birke *at* d-scribe *dot* de)
 * @version 2.2
 * @param {int} maxentries Number of entries to paginate
 * @param {Object} opts Several options (see README for documentation)
 * @return {Object} jQuery Object
 */
 (function($){
    /**
     * @class Class for calculating pagination values
     */
    $.PaginationCalculator = function(maxentries, opts) {
        this.maxentries = maxentries;
        this.opts = opts;
    };

    $.extend($.PaginationCalculator.prototype, {
        /**
         * Calculate the maximum number of pages
         * @method
         * @returns {Number}
         */
        numPages:function() {
            return Math.ceil(this.maxentries/this.opts.items_per_page);
        },
        /**
         * Calculate start and end point of pagination links depending on 
         * current_page and num_display_entries.
         * @returns {Array}
         */
        getInterval:function(current_page)  {
            var ne_half = Math.floor(this.opts.num_display_entries/2);
            var np = this.numPages();
            var upper_limit = np - this.opts.num_display_entries;
            var start = current_page > ne_half ? Math.max( Math.min(current_page - ne_half, upper_limit), 0 ) : 0;
            var end = current_page > ne_half?Math.min(current_page+ne_half + (this.opts.num_display_entries % 2), np):Math.min(this.opts.num_display_entries, np);
      return {start:start, end:end};
        }
    });

    // Initialize jQuery object container for pagination renderers
    $.PaginationRenderers = {};

    /**
     * @class Default renderer for rendering pagination links
     */
    $.PaginationRenderers.defaultRenderer = function(maxentries, opts) {
        this.maxentries = maxentries;
        this.opts = opts;
        this.pc = new $.PaginationCalculator(maxentries, opts);
    };
    $.extend($.PaginationRenderers.defaultRenderer.prototype, {
        /**
         * Helper function for generating a single link (or a span tag if it's the current page)
         * @param {Number} page_id The page id for the new item
         * @param {Number} current_page 
         * @param {Object} appendopts Options for the new item: text and classes
         * @returns {jQuery} jQuery object containing the link
         */
        createLink:function(page_id, current_page, appendopts){
            var lnk, np = this.pc.numPages();
            page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
            appendopts = $.extend({text:page_id+1, classes:""}, appendopts||{});
            var weekamount;
            weekamount = Math.ceil(appendopts.text / 7) * 7;
            weekdaysamount = weekamount - 7;
            if(appendopts.text > 7) {
                appendopts.text = appendopts.text - weekdaysamount;
            }
            if(page_id == current_page){
                lnk = $("<span class='current'>" + appendopts.text + "</span>");
            }
            else
            {
                lnk = $("<a>" + appendopts.text + "</a>")
                .attr('href', this.opts.link_to.replace(/__id__/,page_id));
            }
            if(appendopts.classes){ lnk.addClass(appendopts.classes); }
            if(appendopts.rel){ lnk.attr('rel', appendopts.rel); }
            lnk.addClass('page' + page_id);
            lnk.data('page_id', page_id);
            return lnk;
        },
        // Generate a range of numeric links 
        appendRange:function(container, current_page, start, end, opts) {
            var i;
            for(i=start; i<end; i++) {
                this.createLink(i, current_page, opts).appendTo(container);
            }
        },
        getLinks:function(current_page, eventHandler) {
            var begin, end,
                interval = this.pc.getInterval(current_page),
                np = this.pc.numPages(),
                fragment = $("<div class='pagination'></div>");

            // Generate "Previous"-Link

            currentPrevPageCalc = Math.ceil(current_page / 7) * 7;
            currentPrevPage = currentPrevPageCalc - 14;
            fragment.append(this.createLink(currentPrevPage, current_page, {text:this.opts.prev_text, classes:"prev",rel:"prev"}));

            // Generate starting points
            if (interval.start > 0 && this.opts.num_edge_entries > 0)
            {
                end = Math.min(this.opts.num_edge_entries, interval.start);
                this.appendRange(fragment, current_page, 0, end, {classes:'sp'});
                if(this.opts.num_edge_entries < interval.start && this.opts.ellipse_text)
                {
                    $("<span>"+this.opts.ellipse_text+"</span>").appendTo(fragment);
                }
            }
            // Generate interval links
            this.appendRange(fragment, current_page, interval.start, interval.end);
            // Generate ending points
            if (interval.end < np && this.opts.num_edge_entries > 0)
            {
                if(np-this.opts.num_edge_entries > interval.end && this.opts.ellipse_text)
                {
                    $("<span>"+this.opts.ellipse_text+"</span>").appendTo(fragment);
                }
                begin = Math.max(np-this.opts.num_edge_entries, interval.end);
                this.appendRange(fragment, current_page, begin, np, {classes:'ep'});

            }
            // Generate "Next"-Link
            currentNextPage = Math.ceil(current_page / 7) * 7;
            fragment.append(this.createLink(currentNextPage, current_page, {text:this.opts.next_text, classes:"next",rel:"next"}));

            $('a', fragment).click(eventHandler);
            return fragment;
        }
    });

    // Extend jQuery
    $.fn.pagination = function(maxentries, opts){

        opts = $.extend({
            items_per_page:7,
            num_display_entries:35,
            current_page:1,
            num_edge_entries:0,
            link_to:"#",
            prev_text:"<<",
            next_text:">>",
            ellipse_text:"...",
            prev_show_always:true,
            next_show_always:true,
            renderer:"defaultRenderer",
            show_if_single_page:true,
            load_first_page:true,
            callback:function(){return false;}
        },opts||{});

        var containers = this,
            renderer, links, current_page;

        /**
         * This is the event handling function for the pagination links. 
         * @param {int} page_id The new page number
         */
        function paginationClickHandler(evt){
            var links, 
                new_current_page = $(evt.target).data('page_id'),
                continuePropagation = selectPage(new_current_page);
            if (!continuePropagation) {
                evt.stopPropagation();
            }
            return continuePropagation;
        }

        /**
         * This is a utility function for the internal event handlers. 
         * It sets the new current page on the pagination container objects, 
         * generates a new HTMl fragment for the pagination links and calls
         * the callback function.
         */
        function selectPage(new_current_page) {
            // update the link display of a all containers
            containers.data('current_page', new_current_page);
            links = renderer.getLinks(new_current_page, paginationClickHandler);
            containers.empty();
            links.appendTo(containers);
            // call the callback and propagate the event if it does not return false
            var continuePropagation = opts.callback(new_current_page, containers);
            return continuePropagation;
        }

        // -----------------------------------
        // Initialize containers
        // -----------------------------------
        current_page = parseInt(opts.current_page, 10);
        containers.data('current_page', current_page);
        // Create a sane value for maxentries and items_per_page
        maxentries = (!maxentries || maxentries < 0)?1:maxentries;
        opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page;

        if(!$.PaginationRenderers[opts.renderer])
        {
            throw new ReferenceError("Pagination renderer '" + opts.renderer + "' was not found in jQuery.PaginationRenderers object.");
        }
        renderer = new $.PaginationRenderers[opts.renderer](maxentries, opts);

        // Attach control events to the DOM elements
        var pc = new $.PaginationCalculator(maxentries, opts);
        var np = pc.numPages();
        containers.off('setPage').on('setPage', {numPages:np}, function(evt, page_id) { 
                if(page_id >= 0 && page_id < evt.data.numPages) {
                    selectPage(page_id);
                }
        });
        containers.off('prevPage').on('prevPage', function(evt){
                var current_page = $(this).data('current_page');
                if (current_page > 0) {
                    selectPage(current_page - 1);
                }
                return false;
        });
        containers.off('nextPage').on('nextPage', {numPages:np}, function(evt){
                var current_page = $(this).data('current_page');
                if(current_page < evt.data.numPages - 1) {
                    selectPage(current_page + 1);
                }
                return false;
        });
        containers.off('currentPage').on('currentPage', function(){
                var current_page = $(this).data('current_page');
                selectPage(current_page);
                return false;
        });

        // When all initialisation is done, draw the links
        links = renderer.getLinks(current_page, paginationClickHandler);
        containers.empty();
        if(np > 1 || opts.show_if_single_page) {
            links.appendTo(containers);
        }
        // call callback function
        if(opts.load_first_page) {
            opts.callback(current_page, containers);
        }
    }; // End of $.fn.pagination block

})(jQuery);


function handlePaginationClick(new_page_index, pagination_container) {
    console.log(new_page_index);
}


$.PaginationCalculator.prototype.getInterval = function (current_page) {
    var num_display_entries = this.opts.num_display_entries;
  var start = Math.floor(current_page / num_display_entries) * num_display_entries;
  var end = Math.min(start + num_display_entries, this.numPages());

  return { start: start, end: end };
};


$("#News-Pagination").pagination(150, {
        items_per_page:7,
        num_display_entries: 7,
        callback:handlePaginationClick
});
$.PaginationRenderers.defaultRenderer.prototype.createLink = function(page_id, current_page, appendopts) {
    var lnk, np = this.pc.numPages();
    page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
    appendopts = $.extend({
        //text: page_id+1,
        // Note: This is the only line of code I have changed from the original.
        // It ensures that the link text is only ever within a range of 1 - num_display_entries
        text: (page_id % this.opts.num_display_entries) + 1,
        classes: ""
    }, appendopts||{});
    if(page_id == current_page){
        lnk = $("<span class='current'>" + appendopts.text + "</span>");
    }
    else
    {
        lnk = $("<a>" + appendopts.text + "</a>")
            .attr('href', this.opts.link_to.replace(/__id__/,page_id));
    }
    if(appendopts.classes){ lnk.addClass(appendopts.classes); }
    if(appendopts.rel){ lnk.attr('rel', appendopts.rel); }
    lnk.data('page_id', page_id);
    return lnk;
};